From patchwork Tue Apr 12 10:14:05 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Keerthy X-Patchwork-Id: 560172 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 71D5DC433EF for ; Tue, 12 Apr 2022 11:33:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1347521AbiDLLfi (ORCPT ); Tue, 12 Apr 2022 07:35:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47114 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1352820AbiDLLfX (ORCPT ); Tue, 12 Apr 2022 07:35:23 -0400 Received: from fllv0016.ext.ti.com (fllv0016.ext.ti.com [198.47.19.142]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 38C4813F78; Tue, 12 Apr 2022 03:14:28 -0700 (PDT) Received: from fllv0035.itg.ti.com ([10.64.41.0]) by fllv0016.ext.ti.com (8.15.2/8.15.2) with ESMTP id 23CAENQc014341; Tue, 12 Apr 2022 05:14:23 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1649758463; bh=ipQpcgHXpfbJcelLyl6HL6bFtANq2NPuGwT1Zv7GR7s=; h=From:To:CC:Subject:Date; b=X41862wbNGiNWnnv9sSegH48kEYfCpdGYJpO4nmuVMJLowjNNvNSyjdvAQqRO8KM+ Pa7P12vjmp799tGzDGmbxuqqhFPp4C0mfQCRYDA5WqfTme7dq0esZwkeaWGfEwhG4Q ASAkJsuknoD+gYPxH4jhAanGw9zofsLp3XB0lE3A= Received: from DLEE103.ent.ti.com (dlee103.ent.ti.com [157.170.170.33]) by fllv0035.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 23CAENLd037774 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 12 Apr 2022 05:14:23 -0500 Received: from DLEE102.ent.ti.com (157.170.170.32) by DLEE103.ent.ti.com (157.170.170.33) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2308.14; Tue, 12 Apr 2022 05:14:23 -0500 Received: from fllv0040.itg.ti.com (10.64.41.20) by DLEE102.ent.ti.com (157.170.170.32) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2308.14 via Frontend Transport; Tue, 12 Apr 2022 05:14:23 -0500 Received: from keerthy.dhcp.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by fllv0040.itg.ti.com (8.15.2/8.15.2) with ESMTP id 23CAEJmN122452; Tue, 12 Apr 2022 05:14:20 -0500 From: Keerthy To: , , , , CC: , , , , Subject: [PATCH v5 0/4] thermal: k3_j72xx_bandgap: Add the bandgap driver support Date: Tue, 12 Apr 2022 15:44:05 +0530 Message-ID: <20220412101409.7980-1-j-keerthy@ti.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Add VTM thermal support. In the Voltage Thermal Management Module(VTM), K3 J72XX supplies a voltage reference and a temperature sensor feature that are gathered in the band gap voltage and temperature sensor (VBGAPTS) module. The band gap provides current and voltage reference for its internal circuits and other analog IP blocks. The analog-to-digital converter (ADC) produces an output value that is proportional to the silicon temperature. Currently reading temperatures only is supported. There are no active/passive cooling agent supported. J721e SoCs have errata i2128: https://www.ti.com/lit/pdf/sprz455 The series also incorporates workaround for Errata i2128. Daniel, Apologies for the long silence on this! - Keerthy Changes in v5: * Fixed all the comments on v4. * Simplified the computation of the table. * Removed unnecessary members in the structures. Changes in v4: * Fixed compilation warning with W=1. Changes in v3: * Removed static look up tables & added functions to dynamically generate them. Changes in v2: * Fixed DT binding errors. Keerthy (4): dt-bindings: thermal: k3-j72xx: Add VTM bindings documentation arm64: dts: ti: j721e: Add VTM node arm64: dts: ti: j7200: Add VTM node thermal: k3_j72xx_bandgap: Add the bandgap driver support .../bindings/thermal/ti,j72xx-thermal.yaml | 62 ++ .../boot/dts/ti/k3-j7200-mcu-wakeup.dtsi | 9 + arch/arm64/boot/dts/ti/k3-j7200-thermal.dtsi | 45 ++ arch/arm64/boot/dts/ti/k3-j7200.dtsi | 4 + .../boot/dts/ti/k3-j721e-mcu-wakeup.dtsi | 9 + arch/arm64/boot/dts/ti/k3-j721e-thermal.dtsi | 73 ++ arch/arm64/boot/dts/ti/k3-j721e.dtsi | 4 + drivers/thermal/Makefile | 2 +- drivers/thermal/k3_j72xx_bandgap.c | 623 ++++++++++++++++++ 9 files changed, 830 insertions(+), 1 deletion(-) create mode 100644 Documentation/devicetree/bindings/thermal/ti,j72xx-thermal.yaml create mode 100644 arch/arm64/boot/dts/ti/k3-j7200-thermal.dtsi create mode 100644 arch/arm64/boot/dts/ti/k3-j721e-thermal.dtsi create mode 100644 drivers/thermal/k3_j72xx_bandgap.c